ASM3P623S05 Datasheet, PDF (1/15 Pages) PulseCore Semiconductor – Timing-Safe™ Peak EMI reduction IC

May 2007
rev 0.3
ASM3P623S05/09A/B
Timing-Safe™ Peak EMI reduction IC
General Features
• Clock distribution with Timing-Safe™ Peak EMI
Reduction
• Input frequency range: 20MHz - 50MHz
• Zero input - output propagation delay
• Low-skew outputs
• Output-output skew less than 250pS
• Device-device skew less than 700pS
• Less than 200pS cycle-to-cycle jitter is compatible
with Pentium^® based systems
• Available in 16pin, 150mil SOIC, 4.4mm TSSOP
(ASM3P623S09A/B), and in 8pin, 150 mil SOIC,
4.4mm TSSOP Packages (ASM3P623S05A/B)
• 3.3V Operation
• Advanced CMOS technology
• The First True Drop-in Solution
Functional Description
ASM3P623S05/09A/B is a versatile, 3.3V zero-delay buffer
designed to distribute high-speed Timing-Safe™ clocks
with Peak EMI Reduction. ASM3P623S09A/B accepts one
reference input and drives out nine low-skew clocks. It is
available in a 16pin Package. The ASM3P623S05A/B is
Block Diagram
the eight-pin version and accepts one reference input and
drives out five low-skew clocks.
All parts have on-chip PLLs that lock to an input clock on
the CLKIN pin. The PLL feedback is on-chip and is
obtained from the CLKOUT pad, internal to the device.
Multiple ASM3P623S05/09A/B devices can accept the
same input clock and distribute it. In this case, the skew
between the outputs of the two devices is guaranteed to be
less than 700pS.
All outputs have less than 200pS of cycle-to-cycle jitter.
The input and output propagation delay is guaranteed to be
less than ±350pS, and the output-to-output skew is
guaranteed to be less than 250pS.
Refer “Spread Spectrum Control and Input-Output Skew
Table” for deviations and Input-Output Skew for
ASM3P623S05A/B and ASM3P623S09A/B devices
The ASM3P623S05A/B and ASM3P623S09A/B are
available in two different packages, as shown in the
ordering information table.
PLL
CLKIN
ASM3P623S05A/B
CLKOUT
CLKIN
CLK1
CLK2
CLK3
CLK4
S2
S1
PLL
MUX
Select Input
Decoding
ASM3P623S09A/B
CLKOUT
CLKA1
CLKA2
CLKA3
CLKA4
CLKB1
CLKB2
CLKB3
CLKB4
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: [phone] • Fax: [phone]
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.